Demi Moore, Twitter Save Lives

Demi Moore, Twitter Save Lives

Today 9:53 AM PDT by Breanne L. Heldman

Demi Moore: movie star by day, lifesaving twittering hero by night.

Late Thursday, the G.I. Jane star received a frightening tweet from a woman named "sandieguy."

"I'm just wondering if anyone cares that I'm gonna kill myself now," she wrote to the star. Serious or not, her previous messages that hour—not directed at any one particular person—showed the Silicon Valley girl contemplating suicide and wavering on the decision.

Shortly thereafter, the girl messaged the Ghost star again. "Getting a knife, a big one that is sharp. Going to cut my arm down the whole arm so it doesn't waste time," she wrote.

Moore immediately replied, "Hope you are joking," sharing the scenario with her nearly 400,000 followers.

The brief exchange spurred many people to action, and the San Jose Police Department was flooded with calls on the matter.

"We received several calls in regards to the Twitter threat," San Jose Police Department Public Information Officer Jermaine Thomas told ABC News. "We located the subject and that person was uninjured. We did take the person into custody for evaluation."

"Everyone I was very torn about responding or retweeting that woman's post but felt uncomfortable just letting it go," Moore told her followers an hour later. In another post, she wrote, "Thanks everyone for reaching out to the San Jose PD I am told they are aware and no need to call anymore. I do not know this woman."

A few hours later, the celebrity tweeted a confirmation of the events' validity. "It is my understanding that the situation was not a joke and that through the collective efforts here, action was taken to provide help."

Or, as husband Ashton Kutcher wrote on his own feed: "wifey reported a suicide attempt based on a at reply tweet she got and saved someones life. the woman is in the hospital now."

"It is true, but we are not making any statements about it," Moore's rep, Stephen Huvane, tells E! News. "This woman's privacy and well-being is the most important thing here."

Moore and Kutcher have been among the celebs constantly creating news by their frequent liveblogging via Twitter, sharing with fans and media alike their marriage advice, Oscar parties and drama with neighbors. This, however, was an impressive first.

"This Twitter concept is so new, this is the first time it's led us to what could have been a very real crime," Thomas said. "This could be yet another tool to find out what's going on out there."